Supporting device for height-adjusting of floors



FIG. 1 is a pespective view of supporting device for height-adjusting of floor, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof. 

The ornamental design for supporting device for height-adjusting of floor, as shown in FIGS. 1-7 and as herein described. 